{Secondary axis} (Opt.), any line which passes through the
optical center of a lens but not through the centers of
curvature, or, in the case of a mirror, which passes
through the center of curvature but not through the center
of the mirror.

{Secondary battery}. (Elec.) See under {Battery}, n., 4.

{Secondary circle} (Geom. & Astron.), a great circle that
passes through the poles of another great circle and is
thereforeperpendicular to its plane.

{Secondary circuit}, {Secondary coil} (Elec.), a circuit or
coil in which a current is produced by the induction of a
current in a neighboring circuit or coil called the
primary circuit or coil.

{Secondary color}, a color formed by mixing any two primary
colors in equal proportions.

{Secondary coverts} (Zo["o]l.), the longer coverts which
overlie the basal part of the secondary quills of a bird.
See Illust. under {Bird}.

{Secondary crystal} (Min.), a crystal derived from one of the
primary forms.

{Secondary quills} or {Secondary remiges} (Zo["o]l.), the
quill feathers arising from the forearm of a bird and
forming a row continuous with the primaries; -- called
also {secondaries}. See Illust. of {Bird}.

{Secondary rocks} or {Secondary strata} (Geol.), those lying
between the Primary, or Paleozoic, and Tertiary (see
{Primary rocks}, under {Primary}); -- later restricted to
strata of the Mesozoic age, and at present but little
used.

Look at other dictionaries:

Secondary — Sec ond*a*ry, a. [Cf. F. secondaire, L. secundaire. See {Second}, a.] 1. Succeeding next in order to the first; of second place, origin, rank, etc.; not primary; subordinate; not of the first order or rate. [1913 Webster] Wheresoever there is… … The Collaborative International Dictionary of English

Secondary accent — Secondary Sec ond*a*ry, a. [Cf. F. secondaire, L. secundaire. See {Second}, a.] 1. Succeeding next in order to the first; of second place, origin, rank, etc.; not primary; subordinate; not of the first order or rate. [1913 Webster] Wheresoever… … The Collaborative International Dictionary of English

Secondary age — Secondary Sec ond*a*ry, a. [Cf. F. secondaire, L. secundaire. See {Second}, a.] 1. Succeeding next in order to the first; of second place, origin, rank, etc.; not primary; subordinate; not of the first order or rate. [1913 Webster] Wheresoever… … The Collaborative International Dictionary of English

Secondary alcohol — Secondary Sec ond*a*ry, a. [Cf. F. secondaire, L. secundaire. See {Second}, a.] 1. Succeeding next in order to the first; of second place, origin, rank, etc.; not primary; subordinate; not of the first order or rate. [1913 Webster] Wheresoever… … The Collaborative International Dictionary of English

Secondary amputation — Secondary Sec ond*a*ry, a. [Cf. F. secondaire, L. secundaire. See {Second}, a.] 1. Succeeding next in order to the first; of second place, origin, rank, etc.; not primary; subordinate; not of the first order or rate. [1913 Webster] Wheresoever… … The Collaborative International Dictionary of English

Secondary axis — Secondary Sec ond*a*ry, a. [Cf. F. secondaire, L. secundaire. See {Second}, a.] 1. Succeeding next in order to the first; of second place, origin, rank, etc.; not primary; subordinate; not of the first order or rate. [1913 Webster] Wheresoever… … The Collaborative International Dictionary of English

Secondary battery — Secondary Sec ond*a*ry, a. [Cf. F. secondaire, L. secundaire. See {Second}, a.] 1. Succeeding next in order to the first; of second place, origin, rank, etc.; not primary; subordinate; not of the first order or rate. [1913 Webster] Wheresoever… … The Collaborative International Dictionary of English

Secondary circle — Secondary Sec ond*a*ry, a. [Cf. F. secondaire, L. secundaire. See {Second}, a.] 1. Succeeding next in order to the first; of second place, origin, rank, etc.; not primary; subordinate; not of the first order or rate. [1913 Webster] Wheresoever… … The Collaborative International Dictionary of English

Secondary circuit — Secondary Sec ond*a*ry, a. [Cf. F. secondaire, L. secundaire. See {Second}, a.] 1. Succeeding next in order to the first; of second place, origin, rank, etc.; not primary; subordinate; not of the first order or rate. [1913 Webster] Wheresoever… … The Collaborative International Dictionary of English

Secondary coil — Secondary Sec ond*a*ry, a. [Cf. F. secondaire, L. secundaire. See {Second}, a.] 1. Succeeding next in order to the first; of second place, origin, rank, etc.; not primary; subordinate; not of the first order or rate. [1913 Webster] Wheresoever… … The Collaborative International Dictionary of English